Fuel-burning apparatus



E. C. JACOBSEN.

FUEL BURNING APPARATUS.

APPLICATION FILED Nov. 15. 1920.

1,482,464, Patented Oct. 17, 1922.

Patented ocr. 17, 1922.

UNITED STATES 1,432,464 PATENT OFFICE.

ERA C. JACOBSEN, F OAK PARK, ILLINOIS, ASSIG-NOR, BY MESNE ASSIGNMENTS, T0

AMERICAN STEAM TRUCK COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FUEL-BURNING APPARATUS.

Application led November 15, 1920. Serial No. 424,326.v

' Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in F uol-Burning Apparatus, of which the following is a specication.

My invention relates to fuel burning apparatus and has for one of its objects the provision of simple and eflicient means for starting and controlling the burning of fuel for tubular boilers and the like.

A further object is the provision of simple and efficient means for causing the fuel to operate an electrical switch to facilitate controlling the action of the burning apparatus.

A stilll further object is the provision of simple and eficient means for first igniting fuel and then blowing the lire.`

Other objects will appear hereinafter.

An embodiment of my invention is illustrated in the accompanying drawing forming a part of this specification and in which the gure is a top View partially in section and partially diagrammatic illustrating the fuel burning apparatus embodying my invention.

In the drawing I haveindicated a combustion chamber 1 such as is usedin connection lwith tubular boilers for use in vehicles and the like. At one side of the combustion chamber is an opening 2 in which is connected a tube'3 adapted for feeding fuel and air into the combustion chamber. The other end of the tube 3 is attached to a blower 4 which may be of any conventional construction ,and is adapted to blow air toward the combustion chamber 1. The blower may be operated in any desirable manner such as by an electric motor 5. I have indicated the electric motor as being directly connected to the shaft 6 of the blower 4 but any suitable connection between the blower and motor may be had or other sources of power may be utilized to drive the blower.

Mounted within the tube 3 is a valve body 7 which in the present instance is crossshaped with a perforation extending through each of the arms. The longer arms 8 and 9 are attached to the walls of tube 3 and may be attached in any desirable manner. I have indicated the arm 8 as having a supply pipe 10 extending through one of the Walls therein and said of tube 3 threadedin said arms. The lock nut l1 and pipe l0 serve to hold the arm 8 tightly against tube 3. The other arm 9 eX- tends through an opening 12 in the tube which is covered by a plate 13 and is provided with a lock nut 14 on one side of said plate and a spider 15 on the other side of the plate.4 This eectively locks arm 9 in the other side of tube 3.

The arm 16 of member 7 has a nozzle 17 attached thereto and is preferably arranged so that the opening through said nozzle is at substantially the axis of tube 3. The arm 18 of member 7 has a pipe 19 connected pipe extends out through plate 13.

The outer end of arm 9 of member 7 has a stuffing box 20 fitted thereon which effectively packs a valve stem 21 which extends through arm 9 and is adapted to move a ball valve 22 against its seat near the center of the member 7 and close the passage in arm 8. The valve stem 21 extends into a cylinder 23 and connects with a piston 24 in said cylinder. At the upper end of cylinder 23 is a diaphragm 25 against which the piston 24 rests. A spring 26 presses against the piston 24 holding the latter against the diaphragm and valve stem 21 away from the ball valve22 when in its normal position. After a sufficient head of steam has been raised the pressure of such steam entering through pipe 27 against diaphragm 25 presses piston head 24 and valve rod 21 downwardly against theinfluence of spring 26 to close valve 22, thereby cutting off the supply of fuel and consequently extinguishing the fire. When the steam pressure in pipe 27 has been reduced below a predetermined pressure spring 26 again opens stem 21 so that the fuel in pipe l0 can again raise ball valve 22 and permit a new supply of fuel to pass to the nozzle 17.

The pipe 19 is connected with a fuel operated means for operating aswitch arm for cont-rolling the electrical circuits utilized in y controlling the burning apparatus. In the present instance this fuel operating means comprises a casing 28 which has a block 29 fixed therein and connecting with pipe 19. Extending from the block 29 is a curved tubular spring 30 which is adapted to straighten out under pressure of fuel. It will be apparent thatwhen fuel under pressure is admitted through valve 22 that such 30 rotates shaft 31.

fuel will back up inpipe 19 and tube 30 due to the opening in nozzle 17 being considerably smaller than the opening through valve 22. '.llhis pressure of fuel backing up in tube 30 tends to straighten. out said tube and this movement is utilized to operate a switch arm.

' Journaled in casing 28 is a shaft 31 having a lever 32 fixed thereon and said lever 22 is connected through a connecting link 33 with tube 30 so that flexing of said tube Shaft 31 extends out through the front wall 34 of the casing 28 and has fixed on its outer end an arm 35.` Attached to arm 35 is an electrical conductor 36. rlfhe arm 35 should be made of an electrical insulating material, or else the conductor should be insulated from said arm..

The valve 37 is connected to pipe 1() and is adapted to turn on and off fuel from the burning apparatusAttached to the stem of said valve l provide a switch arm.

38 whichmay be in electrical connection with the valve 37. A fixed contact 39 is mounted so as to be engaged by arm- 38 and arranged so that when valve 37 is closed, such as indicated, arm 38 will be out of engagement with 'contact 39 and when the valve 37 is opened said arm will be in engagement with contact 39. 'lhe contact 39 is connected through a wire 40 with an electric battery 41 and the other side of the electric battery 41 is connected by. a wire 42 with the conductor 36 on switch arm 35. The conductor 36 has a projection 43 which is adapted to engage a contact 44 on casing 28 and said contact is connected by a wire 45 with the primary coi-l of an induction coil 46. rl`he other end of the induction coil is grounded through a wire 47 withY a'portion of the burning apparatus so as to complete the circuit back to valve 37. i?

Also mountedon the top 34 of casing 28 is a contact, 48 which is in position to be engaged by a projection 49 on conductor 36 so that when lever 3,5` is moved to contact 48 the electrical blower circuit will be closed. The .conductor 48 is connectedby a wire 50 to anelectromagnet 51 and the latter is connected by a wire 52 to motor 5. The other pole of motor 5 is connected through a'wire 53 to wire 40 so that Yan electric circuit may be made through wire 42, conductory 36, projection 49, contact 48. wire 50, electromagnet 51, wire 52, motor 5, wire 53, wire 40 and battery 41.

A contact member 54 is mounted on plate 34 of casing 28 in a position to be engaged by a projection 55 on conductor 36. rFhe contact 54 is connected by a wire 56 with a switch 57, and the latter is operated by the armature 58 of the electromagnet 51.

wire 50.

Thel armature is connected by a' wire 59 with,

` Maasaalllhen operating my, device valve 37 is connected through a pipe 6() with any suitable source of fuel under pressure, not

shown. rllhe parts of the apparatus are in v their positions substantially as indicated when the device is'not' in use, and upon opening valve 37 fuel is permitted to pass into pipe 10 and raise valve 22 and pass vout vthrough nozzle 17. As valve 37? is opened arm 38 engages contact,39, closing the ignition circuit, therebycausing the l spark coil to produce sparks in spark plug 61, which may be of any approved design. 'lhe spark plug 61 is indicated as being connected with the induction coil 46 by the wire 62 and grounded through a wire 63 with wire 47. As the fuel in member 7 backs up in pipe 19 and tube 30 its pressure rises and Hexes tube 30 to move switch arm 35.V This movement disconnects projection 43 from contact 44, thereby cutting off the current from spark plug 61.' Since the projection 43 is then out of engagement withcontact drives arm 35 back towardits position indicated. As the arm 35 moves backwardly projection 55-continues its engagement with contact 54,` which is. considerably longer thanv contact 48, so as to continue the operation of the blower while the fuel is passing As f outl of nozzle'l? so vas to cause complete couil being fed to the combustion chamber. While projection 55 is in engagement with contact 54 and after projection 49 leaves contact 48, current will pass fromy conductor 36 through Wire. 56, switch 57, armature 58, wire 59, wire 50 to the electromagnet 51, causing the latter to continue to hold armature 58 down, vthereby keeping the circuit closed until projection 55 leaves contact 54.

`bustion of the fuel as long as the latter is With this arrangement the fuel is ignited just as soon as it begins to emerge from nozzle 17, as the sparks will be produced in spark plug 61 by the time or before fuel emerges from nozzle-17. This fuel will'be fully ignited before the arm 35 has traveled sufficiently to engage projection 49 with stop 48. Since contact 54 is connected through switch 57, which is open until closed by a current passing through the electromagnet, no circuit will' be completed through the motor until-contact 49 reaches contact 48. As already explained, the blower will con tinue to operate after the fuel is cut off until conductor 36 is out of electrical connection with contact 54.

In some instances electromagnet 5l, contact 54, wire 56, switch 57, armature 58 and wire 59 may be dispensed with, thereby permitting the blower circuit to be broken as soon as the projection 49 leaves contact 48.

I claim:

l. In combination, a fuel valve; a fuel nozzle connected with said valve; an ignition circuit; a blower circuit; a contact in each of said circuits; a single switch mem ber adapted to engage each of said contacts in succession; and a fuel operable means connected with said switch arm and the fuel valve, adapted for operation by fuel backing up between said nozzle and said fuel operable means.

2. In combination, a fuel valve casing; a fuel nozzle connected with said valve casing; an electrical switch arm/,operating means connected with said valve casing; and a valve in said valve casing adapted to control the supply of fuel to both said nozzle and said switch operating means at the same time.

3. In combination, a fuel valve casing; a fuel nozzle connected with the Valve casing; an electrical switch arm operating means connected with said valve casing; a valve in said valve casing; resilient means normally holding the valve open; and a steam operable means associated with the resilient means adapted to close said valve.

' 4. In combination, a valve; a blower circuit; an ignition circuit; fixed contacts in said circuits; a switch arm attached to said valve and adapted to engage one of said contacts; a fuel operable means; and a switch arm attached to the fuel operable means and adapted to engage said other contacts.

5. In combination, a fuel nozzle, a fuel operable means connected with said fuel nozzle; a blower circuit; an ignition circuit; a contact in each of said circuits; and a switch arm connected with said fuel operable mea-ns and normally in engagement with one of said contacts and adapted to be moved by said fuel operable means to said other contact.

6. In combination, a fuel valve; a blower circuit; an ignition circuit; a contact ineach circuit; a switch arm normally engaging the contact'in one of said circuits; and means for moving said switch arm'from off the latter contact and over to the contact in said other circuit.

-7. In combination, a fuel valve; a blower circuit; an ignition circuit; a switch arm normally engaging the contact in said ignition circuit; means for moving said arm over to the contact in the blower circuit; a fixed contact in the ignition circuit;l and a switch arm connected with said fuel valve adapted to engage the last mentioned contact.

circuit; an ignition circuit; a contact in each circuit; a curved spring tube connected with said valve and adapted to be flexed by pressure of fuel from said fuel valve; and a switch arm connected with said curved spring tube and adapted for movement from one of said contacts to the other.

10. In combination, a fuel valve; a blower circuit; an ignition circuit; a contact in each circuit; a curved spring tube connected with said valve and adapted tobe flexed by pressure of fuel from said valve; a switch arm connected with said curved spring tube normally engaging the contact in the ignition circuit; and a switch arm in the ignition circuit connected with said fuel valve and adapted to be closed when the latter is open.

l1. In combination, a main electrical circuit; a branch electrical circuit connected with said main circuit; a short contact in one of said circuits; a long contact in the other circuit; amswitch in the circuit having the longer contact; an electromagnet common to both circuits and adapted to operate said switch; and a switch arm adapted to engage both of said contacts.

12. In combination, a main blower circuit; a branch blower circuit connected to said mai-n circuit; an ignition circuit; a contact in each of said circuits; a switch arm normally engaging the contact in the ignition circuit; and) means for moving said switch arm to engage the contacts in said blower circuits.

13. In combination, a main blower circuit; a branch blower circuit connected with said `main blower circuit; an ignition circuit; a contact in each of said circuits; a switch arm normally engaging the contact in the ignition circuit; an electromagnet common to both blower circuits; a switch in the branch blower circuit; and means for moving said switch arm out of electrical contact with the contact in the ignition circuit and into engagement with both of the contacts in the blower circuits, the contact in the branch blower circuit bein considerably longer than the contact 1n the main circuit so asto clo the branch blower circuit a considerable time after the main blower circuit has been opened.

14. ln a fuel burning and beating apparatus the'eombination of a blower oircuit and an ignition circuit, a fuel nozzle adapted to deliver fuel to the burner7 a fuel valve controlling the delivery of fuel to said nozzlee a second fuel control valve under the control of the steam pressure and adapted to shut off the supply of fuel to the nozzle, a switch arm operatively responsive to the flow of fuel past said valves, said switch arm normally closing the ignition circuit for starting the ignition system but adapted to be actuated by the fuel pressures supplied to the nozzle to move from the ignition circuit and close the blower circuit and an ignition circuit switch which is automatically elosable simultaneouslyl with the opening ofthe first fuel valve.

15. lis a fuel burningand heating apparatus the'combination of a blower circuit and an ignition circuit, a fuel nozzle adapted to deliver fuel to the burner, a fuel valve controlling the flow of fuel to the nozzle, a switch normally olosing the ignition ciranaaaee blower, means for controlling the supply of fuel to said nozzle and controlling the starting of the motor together with devices for delaying the stoppage of the motor and oontinulng the operation of the blower for a short time after the controlling means for the starting thereof is in the stop position.

ln testimony whereof l have signed my name to this s ecilioation on this 12th day of November, D. 1920.

' ERA C. JCOBSEN. 

